QProgressBar的简单使用与样式优化实例工程源码

#include "progressdlg.h" #include <QProgressDialog> #include <QFont> ProgressDlg::ProgressDlg(QWidget *parent) : QDialog(parent) { //设置字体，标题 QFont font("ZYSong18030",12); setFont(font); setWindowTitle(tr("Progress")); FileNum =new QLabel; FileNum->setText(tr("文件数目：")); FileNumLineEdit =new QLineEdit; FileNumLineEdit->setText(tr("1000000")); //选择显示方式 ProgressType =new QLabel; ProgressType->setText(tr("显示类型：")); comboBox =new QComboBox; comboBox->addItem(tr("progressBar")); comboBox->addItem(tr("progressDialog")); progressBar =new QProgressBar; starBtn =new QPushButton(); starBtn->setText(tr("开始")); mainLayout =new QGridLayout(this); mainLayout->addWidget(FileNum,0,0); mainLayout->addWidget(FileNumLineEdit,0,1); mainLayout->addWidget(ProgressType,1,0); mainLayout->addWidget(comboBox,1,1); mainLayout->addWidget(progressBar,2,0,1,2); mainLayout->addWidget(starBtn,3,1); //用于设置布局的边距 mainLayout->setMargin(15); //用于设置布局中窗口部件之间的间距 mainLayout->setSpacing(10); //建立联系 connect(starBtn,SIGNAL(clicked()),this,SLOT(startProgress())); progressBar->setStyleSheet("QProgressBar {background-color: pink;border: 1px solid black;border-radius: 5px;height: 20px;} " "QProgressBar::chunk {background-color: green;width: 20px;margin: 1px;}"); } ProgressDlg::~ProgressDlg() { } void ProgressDlg::startProgress() { bool ok; //获取当前需要复制的文件数目，这里对应进度条的总步进值 int num =FileNumLineEdit->text().toInt(&ok); if(comboBox->currentIndex()==0) //ProgressBar { progressBar->setRange(0,num); for(int i=1;i<num+1;i++) { //QProgressBar的使用 progressBar->setValue(i); } } else if(comboBox->currentIndex()==1) //ProgressDialog { //新建一个QProgressDialog对象 QProgressDialog *progressDialog=new QProgressDialog(this); QFont font("ZYSong18030",12); progressDialog->setFont(font); //设置进度对话框采用模态方式进行显示，即显示进度的同时，其他窗口将不响应输入信号 progressDialog->setWindowModality(Qt::ApplicationModal); //设置进度对话框出现需等待的时间，此处设定为 5 秒，默认为 4 秒 progressDialog->setMinimumDuration(5); progressDialog->setWindowTitle(tr("Please Wait")); progressDialog->setLabelText(tr("Copying...")); progressDialog->setCancelButtonText(tr("Cancel")); //设置进度对话框的步进范围 progressDialog->setRange(0,num); for(int i=1;i<num+1;i++) { progressDialog->setValue(i); //检测 "取消”按钮是否被触发，若触发则退出循环并关闭进度对话框 if(progressDialog->wasCanceled()) return; } } }